/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/random_seed.h"
#include "libavutil/opt.h"
#include "vulkan.h"
#include "internal.h"
#define CGROUPS (int [3]){ 32, 32, 1 }
typedef struct ChromaticAberrationVulkanContext {
VulkanFilterContext vkctx;
int initialized;
FFVkExecContext *exec;
VulkanPipeline *pl;
/* Shader updators, must be in the main filter struct */
VkDescriptorImageInfo input_images[3];
VkDescriptorImageInfo output_images[3];
/* Push constants / options */
struct {
float dist[2];
} opts;
} ChromaticAberrationVulkanContext;
static const char distort_chroma_kernel[] = {
C(0, void distort_rgb(ivec2 size, ivec2 pos) )
C(0, { )
C(1, const vec2 p = ((vec2(pos)/vec2(size)) - 0.5f)*2.0f; )
C(1, const vec2 o = p * (dist - 1.0f); )
C(0, )
C(1, vec4 res; )
C(1, res.r = texture(input_img[0], ((p - o)/2.0f) + 0.5f).r; )
C(1, res.g = texture(input_img[0], ((p )/2.0f) + 0.5f).g; )
C(1, res.b = texture(input_img[0], ((p + o)/2.0f) + 0.5f).b; )
C(1, res.a = texture(input_img[0], ((p )/2.0f) + 0.5f).a; )
C(1, imageStore(output_img[0], pos, res); )
C(0, } )
C(0, )
C(0, void distort_chroma(int idx, ivec2 size, ivec2 pos) )
C(0, { )
C(1, vec2 p = ((vec2(pos)/vec2(size)) - 0.5f)*2.0f; )
C(1, float d = sqrt(p.x*p.x + p.y*p.y); )
C(1, p *= d / (d* dist); )
C(1, vec4 res = texture(input_img[idx], (p/2.0f) + 0.5f); )
C(1, imageStore(output_img[idx], pos, res); )
C(0, } )
};
static av_cold int init_filter(AVFilterContext *ctx, AVFrame *in)
{
int err;
ChromaticAberrationVulkanContext *s = ctx->priv;
/* Create a sampler */
VkSampler *sampler = ff_vk_init_sampler(ctx, 0, VK_FILTER_LINEAR);
if (!sampler)
return AVERROR_EXTERNAL;
s->vkctx.queue_family_idx = s->vkctx.hwctx->queue_family_comp_index;
s->vkctx.queue_count = GET_QUEUE_COUNT(s->vkctx.hwctx, 0, 1, 0);
s->vkctx.cur_queue_idx = av_get_random_seed() % s->vkctx.queue_count;
s->pl = ff_vk_create_pipeline(ctx);
if (!s->pl)
return AVERROR(ENOMEM);
/* Normalize options */
s->opts.dist[0] = (s->opts.dist[0] / 100.0f) + 1.0f;
s->opts.dist[1] = (s->opts.dist[1] / 100.0f) + 1.0f;
{ /* Create the shader */
const int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
VulkanDescriptorSetBinding desc_i[2] = {
{
.name = "input_img",
.type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
.dimensions = 2,
.elems = planes,
.stages = VK_SHADER_STAGE_COMPUTE_BIT,
.updater = s->input_images,
.samplers = DUP_SAMPLER_ARRAY4(*sampler),
},
{
.name = "output_img",
.type = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE,
.mem_layout = ff_vk_shader_rep_fmt(s->vkctx.output_format),
.mem_quali = "writeonly",
.dimensions = 2,
.elems = planes,
.stages = VK_SHADER_STAGE_COMPUTE_BIT,
.updater = s->output_images,
},
};
SPIRVShader *shd = ff_vk_init_shader(ctx, s->pl, "chromaber_compute",
VK_SHADER_STAGE_COMPUTE_BIT);
if (!shd)
return AVERROR(ENOMEM);
ff_vk_set_compute_shader_sizes(ctx, shd, CGROUPS);
GLSLC(0, layout(push_constant, std430) uniform pushConstants { );
GLSLC(1, vec2 dist; );
GLSLC(0, }; );
GLSLC(0, );
ff_vk_add_push_constant(ctx, s->pl, 0, sizeof(s->opts),
VK_SHADER_STAGE_COMPUTE_BIT);
RET(ff_vk_add_descriptor_set(ctx, s->pl, shd, desc_i, 2, 0)); /* set 0 */
GLSLD( distort_chroma_kernel );
GLSLC(0, void main() );
GLSLC(0, { );
GLSLC(1, ivec2 pos = ivec2(gl_GlobalInvocationID.xy); );
if (planes == 1) {
GLSLC(1, distort_rgb(imageSize(output_img[0]), pos); );
} else {
GLSLC(1, ivec2 size = imageSize(output_img[0]); );
GLSLC(1, vec2 npos = vec2(pos)/vec2(size); );
GLSLC(1, vec4 res = texture(input_img[0], npos); );
GLSLC(1, imageStore(output_img[0], pos, res); );
for (int i = 1; i < planes; i++) {
GLSLC(0, );
GLSLF(1, size = imageSize(output_img[%i]); ,i);
GLSLC(1, if (IS_WITHIN(pos, size)) { );
GLSLF(2, distort_chroma(%i, size, pos); ,i);
GLSLC(1, } else { );
GLSLC(2, npos = vec2(pos)/vec2(size); );
GLSLF(2, res = texture(input_img[%i], npos); ,i);
GLSLF(2, imageStore(output_img[%i], pos, res); ,i);
GLSLC(1, } );
}
}
GLSLC(0, } );
RET(ff_vk_compile_shader(ctx, shd, "main"));
}
RET(ff_vk_init_pipeline_layout(ctx, s->pl));
RET(ff_vk_init_compute_pipeline(ctx, s->pl));
/* Execution context */
RET(ff_vk_create_exec_ctx(ctx, &s->exec));
s->initialized = 1;
return 0;
fail:
return err;
}
static int process_frames(AVFilterContext *avctx, AVFrame *out_f, AVFrame *in_f)
{
int err = 0;
VkCommandBuffer cmd_buf;
ChromaticAberrationVulkanContext *s = avctx->priv;
AVVkFrame *in = (AVVkFrame *)in_f->data[0];
AVVkFrame *out = (AVVkFrame *)out_f->data[0];
int planes = av_pix_fmt_count_planes(s->vkctx.output_format);
/* Update descriptors and init the exec context */
ff_vk_start_exec_recording(avctx, s->exec);
cmd_buf = ff_vk_get_exec_buf(avctx, s->exec);
for (int i = 0; i < planes; i++) {
RET(ff_vk_create_imageview(avctx, s->exec, &s->input_images[i].imageView,
in->img[i],
av_vkfmt_from_pixfmt(s->vkctx.input_format)[i],
ff_comp_identity_map));
RET(ff_vk_create_imageview(avctx, s->exec, &s->output_images[i].imageView,
out->img[i],
av_vkfmt_from_pixfmt(s->vkctx.output_format)[i],
ff_comp_identity_map));
s->input_images[i].imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
s->output_images[i].imageLayout = VK_IMAGE_LAYOUT_GENERAL;
}
ff_vk_update_descriptor_set(avctx, s->pl, 0);
for (int i = 0; i < planes; i++) {
VkImageMemoryBarrier bar[2] = {
{
.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
.srcAccessMask = 0,
.dstAccessMask = VK_ACCESS_SHADER_READ_BIT,
.oldLayout = in->layout[i],
.newLayout = s->input_images[i].imageLayout,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.image = in->img[i],
.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
.subresourceRange.levelCount = 1,
.subresourceRange.layerCount = 1,
},
{
.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER,
.srcAccessMask = 0,
.dstAccessMask = VK_ACCESS_SHADER_WRITE_BIT,
.oldLayout = out->layout[i],
.newLayout = s->output_images[i].imageLayout,
.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED,
.image = out->img[i],
.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
.subresourceRange.levelCount = 1,
.subresourceRange.layerCount = 1,
},
};
vkCmdPipelineBarrier(cmd_buf, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT,
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT, 0,
0, NULL, 0, NULL, FF_ARRAY_ELEMS(bar), bar);
in->layout[i] = bar[0].newLayout;
in->access[i] = bar[0].dstAccessMask;
out->layout[i] = bar[1].newLayout;
out->access[i] = bar[1].dstAccessMask;
}
ff_vk_bind_pipeline_exec(avctx, s->exec, s->pl);
ff_vk_update_push_exec(avctx, s->exec, VK_SHADER_STAGE_COMPUTE_BIT,
0, sizeof(s->opts), &s->opts);
vkCmdDispatch(cmd_buf,
FFALIGN(s->vkctx.output_width, CGROUPS[0])/CGROUPS[0],
FFALIGN(s->vkctx.output_height, CGROUPS[1])/CGROUPS[1], 1);
ff_vk_add_exec_dep(avctx, s->exec, in_f, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT);
ff_vk_add_exec_dep(avctx, s->exec, out_f, VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT);
err = ff_vk_submit_exec_queue(avctx, s->exec);
if (err)
return err;
return err;
fail:
ff_vk_discard_exec_deps(avctx, s->exec);
return err;
}
static int chromaber_vulkan_filter_frame(AVFilterLink *link, AVFrame *in)
{
int err;
AVFilterContext *ctx = link->dst;
ChromaticAberrationVulkanContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
err = AVERROR(ENOMEM);
goto fail;
}
if (!s->initialized)
RET(init_filter(ctx, in));
RET(process_frames(ctx, out, in));
err = av_frame_copy_props(out, in);
if (err < 0)
goto fail;
av_frame_free(&in);
return ff_filter_frame(outlink, out);
fail:
av_frame_free(&in);
av_frame_free(&out);
return err;
}
static void chromaber_vulkan_uninit(AVFilterContext *avctx)
{
ChromaticAberrationVulkanContext *s = avctx->priv;
ff_vk_filter_uninit(avctx);
s->initialized = 0;
}
#define OFFSET(x) offsetof(ChromaticAberrationVulkanContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption chromaber_vulkan_options[] = {
{ "dist_x", "Set horizontal distortion amount", OFFSET(opts.dist[0]), AV_OPT_TYPE_FLOAT, {.dbl = 0.0f}, -10.0f, 10.0f, .flags = FLAGS },
{ "dist_y", "Set vertical distortion amount", OFFSET(opts.dist[1]), AV_OPT_TYPE_FLOAT, {.dbl = 0.0f}, -10.0f, 10.0f, .flags = FLAGS },
{ NULL },
};
AVFILTER_DEFINE_CLASS(chromaber_vulkan);
static const AVFilterPad chromaber_vulkan_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = &chromaber_vulkan_filter_frame,
.config_props = &ff_vk_filter_config_input,
},
{ NULL }
};
static const AVFilterPad chromaber_vulkan_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &ff_vk_filter_config_output,
},
{ NULL }
};
AVFilter ff_vf_chromaber_vulkan = {
.name = "chromaber_vulkan",
.description = NULL_IF_CONFIG_SMALL("Offset chroma of input video (chromatic aberration)"),
.priv_size = sizeof(ChromaticAberrationVulkanContext),
.init = &ff_vk_filter_init,
.uninit = &chromaber_vulkan_uninit,
.query_formats = &ff_vk_filter_query_formats,
.inputs = chromaber_vulkan_inputs,
.outputs = chromaber_vulkan_outputs,
.priv_class = &chromaber_vulkan_class,
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
};